commit c31c8308d8920733d20fef2898f5113e7d6d2140
Author: turtlebasket <turtlebasket@gmail.com>
Date:   Wed Nov 30 12:18:33 2022 +0900

    initial commit

diff --git a/.gitignore b/.gitignore
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index 0000000..07c6b6f
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,16 @@
+# output output
+build/
+
+# cmake general
+CMakeLists.txt.user
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Testing
+Makefile
+cmake_install.cmake
+install_manifest.txt
+compile_commands.json
+CTestTestfile.cmake
+_deps
+Footer
diff --git a/.vscode/settings.json b/.vscode/settings.json
new file mode 100644
index 0000000..304dc73
--- /dev/null
+++ b/.vscode/settings.json
@@ -0,0 +1,6 @@
+{
+    "cmake.sourceDirectory": "${workspaceFolder}/v1",
+    "files.associations": {
+        "vector": "cpp"
+    }
+}
\ No newline at end of file
diff --git a/v1/.gitignore b/v1/.gitignore
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index 0000000..095be9b
--- /dev/null
+++ b/v1/.gitignore
@@ -0,0 +1,5 @@
+*
+!CMakeLists.txt
+!*.cpp
+!*.hpp
+!.gitignore
diff --git a/v1/CMakeLists.txt b/v1/CMakeLists.txt
new file mode 100644
index 0000000..a77de4d
--- /dev/null
+++ b/v1/CMakeLists.txt
@@ -0,0 +1,2 @@
+project(test_econ_model)
+add_executable(main main.cpp)
diff --git a/v1/main.cpp b/v1/main.cpp
new file mode 100644
index 0000000..1107fbc
--- /dev/null
+++ b/v1/main.cpp
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+#include <iostream>
+#include <vector>
+#include <cmath>
+#include <random>
+
+std::vector<float> ages;
+std::vector<int> balances;
+
+const int N = 10000;
+const int DURATION = 1000;
+const int MAX_AGE = 100;
+
+const int LOGISTIC_CARRYING_CAPACITY = 100000;
+const int LOGISTIC_GROWTH_RATE = 1;
+const int LOGISTIC_MIDPOINT = DURATION / 2;
+
+// state mutation funcs
+
+void transfer_balance(int from, int to, int balance) {
+    balances[from] -= balance;
+    balances[to] += balance;
+}
+
+void kill_even_redist(int id) {
+    ages.erase(ages.begin()+id);
+    balances.erase(balances.begin()+id);
+}
+
+void kill_inheritance(int id) {
+    ages.erase(ages.begin()+id);
+    balances.erase(balances.begin()+id);
+}
+
+void frame_quarter() {
+    for (int i = 0; i < ages.size(); i++) {
+        ages[i] += 1;
+        if (ages[i] > MAX_AGE) {
+            kill_inheritance(i);
+        }
+    }
+}
+
+// modeling functions
+
+float logistic_func(int year) {
+    // https://en.wikipedia.org//wiki/Logistic_function
+    return LOGISTIC_CARRYING_CAPACITY / (1 + (-LOGISTIC_GROWTH_RATE * exp(year - LOGISTIC_MIDPOINT)));
+}
+
+int main() {
+    // init state
+    for (int i = 0; i < 1000; i++) {
+        std::cout << logistic_func(i) << std::endl;
+    }
+
+    return 0;
+}